Nervous and Cowardly (but not a wimp):
While he can be easily manipulated and appears cowardly, he's not truly a wimp and is capable of acting bravely when necessary. 

Intelligent and Inventive:
He's a brilliant scientist, capable of creating complex technology and devising plans. 

Kind and Respectful:
Despite his nervous nature, he's generally a kind and respectful person, especially towards 5.0.5., whom he views as his son

Appearance: He wears a paper bag on his head with a lab coat